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98eceae55e
Handler is like http.Handler, but returns errors. ErrHandler converts back to an http.Handler, with added error handling and logging. Signed-off-by: David Anderson <dave@natulte.net>
62 lines
1.7 KiB
Go
62 lines
1.7 KiB
Go
// Copyright (c) 2020 Tailscale Inc & AUTHORS All rights reserved.
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// Use of this source code is governed by a BSD-style
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// license that can be found in the LICENSE file.
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package tsweb
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import (
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"encoding/json"
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"fmt"
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"strings"
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"time"
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)
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// Msg is a structured event log entry.
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type Msg struct {
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Where string `json:"where"`
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When time.Time `json:"when"`
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Duration time.Duration `json:"duration,omitempty"`
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Domain string `json:"domain,omitempty"`
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Msg string `json:"msg,omitempty"`
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Err error `json:"err,omitempty"`
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HTTP *MsgHTTP `json:"http,omitempty"`
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Data interface{} `json:"data,omitempty"`
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}
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// MsgHTTP contains information about the processing of one HTTP
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// request.
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type MsgHTTP struct {
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Code int `json:"code"`
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Path string `json:"path"`
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RemoteAddr string `json:"remote_addr"`
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UserAgent string `json:"user_agent"`
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Referer string `json:"referer"`
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}
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// String returns m as a JSON string.
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func (m Msg) String() string {
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if m.When.IsZero() {
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m.When = time.Now()
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}
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var buf strings.Builder
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json.NewEncoder(&buf).Encode(m)
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return strings.TrimRight(buf.String(), "\n")
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}
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// HTTPError is an error with embedded HTTP response information. When
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// received by an ErrHandler, the Code and Msg are sent to the client,
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// while Err is logged on the server.
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type HTTPError struct {
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Code int
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Msg string // sent to the end-user
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Err error
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}
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// Error implements the error interface.
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func (e HTTPError) Error() string { return fmt.Sprintf("httperror{%d, %q, %v}", e.Code, e.Msg, e.Err) }
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// Error returns an HTTPError containing the given information.
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func Error(code int, msg string, err error) HTTPError {
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return HTTPError{Code: code, Msg: msg, Err: err}
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}
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